Die-cast threaded object



Sept 3 E. N. JACOB! DIE CAST THREADED OBJECT Filed Jan. 8, 1934 "IRA Fatentedl fiept. 11 1934 y UNITED STATES PATENT OFFICE DIE-CAST THREADED OBJECT Edward N. Jacobi, Milwaukee, Wis., assignor' to Briggs & Stratton Corporation, Milwaukee, Wis., a corporation of Delaware Application January 8, 1934, Serial No. 705,688

r 3 Claims. (01. ss-1) This invention relates to improvements in diethe hereindisclosed invention may be made as cast threaded objects and refers more particularcome within the scope of the claims.

ly to die-cast mounting members for cylinder In the accompanying drawing, I have illuslocks. trated one complete example of the physical em- Mounting members for cylinder locks generally bodiment of my invention constructed according 69 comprise a cylindrical body bored to receive the to the best modes I have so far devised for the lock cylinder and adapted to be mounted in an practical application of the principles thereof,

opening in a mounting panel. An enlarged anand in which:

nular flange on the front end of the cylindrical Figure 1 is a side view of a conventional lock body limits inward movement thereof and affords structure embodying this invention;

a shoulder between which and a nut threaded on Figure 2 is an enlarged perspective view of a the cylindrical body, the panel is clamped. lock mounting member constructed in accordance The mounting members are die-cast complete with this invention. a with the threads and the split type of die is pref- Referring now more particularly to the accom erably employed. Consequently, there is apt to panying drawing, the numeral 5 designates the be a slight misalignment between the threads mounting member of a conventional cylinder formed by one half of the die and those formed lock. The mounting member comprises a cylinby the other half of the die. Where the threads. drical body portion 6, bored as at '7 to receive a are continued entirely about the cylindrical body, lock cylinder 8 and provided at its outer end with 20 this slight misalignment forms abrupt shoulders an annular flange 9. The cylindrical body 6 is 7&3

at the line of part. These shoulders at the line adapted to be passed through an opening in a of juncture between the two halves of the castmounting panel 10, where it is held in place by ing necessitate a loose fit of the nut on the mounta clamping nut 11 threaded on the cylindrical ing member, which is obviously objectionable. body.

To overcome this difficulty, it has been eus- The threads 12 on the body member 6 on which tomary to cut away the opposite sides of the castthe nut 11 is threaded, extend from a point adn ing in line with the juncture between die sections jacent the flange 9 rearwardly to a point close so that the threads were not continued entirely to the rear end of the body. about the cylindrical body. Consequently, in the At diametrically opposite sides and in line with 30 event of misalignment between the threads of the the juncture between the two halves of the casttwo halves, the objectionable abrupt shoulders ing, the cylindrical body is slabbed off or flattened were not present and it was possible to properly as at 13, so that any misalignment existing beilt the nut on the thread. But, while the provitween the threads formed by one die section, and sion of-fiat sides overcame the objectionable rethose formed by the other die section, will not quirement for a loose fit, it resulted in another form abrupt shoulders. disadvantage arising from the fact that there To preclude the possibility of starting the nut were two starting points for the thread. Hence, improperly, or in a cocked" position, the rearunles eXtl'eme e Was eXeYCiSed in pp yi most thread 14 is continued across one of the flat the nut, there was a strong probability that it sides 13, as at 15, thus locating the starting point 40 would be started with the threads crossed. 16 of the thread on a cylindrical portion of the This invention .has as its object the provision body member, 1 of means to preclude this possibility of starting The continuation of this single thread across the nut in a cocked position, and contemplates one of the fiat sides 13 precludes starting the nut as a further object, the provision of means for atapoint diametrically opposite the proper start- 45 preventing p p starting of h t While at ing point, and thus obviates the possibility of we the same time retainin the advantages f fl starting the nut with its threads crossed. Any tened sides in line with the juncture of the die shoulder formed by possible misalignment besections. tween the die sections on the portion 15 of the With the above and other objects in view which single thread 14 obviously is not objectionable and so will appe r a t description proceeds, y does not necessitate a looser fit oi the nut on the vention resides in the novel construction, combith d, nation and arrangement of parts substantially as From the foregoing description taken in conhereinafter described and more particularly denection with the accompanying drawing, it will fined by the appended claims, it being understood be readily apparent to those skilled in the art, that 65 that such changes in the precise embodiment of this invention afiords' novel means for insuring no having opposite fiat sides which cut off part of the thread, means to insureproper application of a nut on the thread comprising a continuation of the outermost thread across one of the fiat sides.

3. Means to insure the proper application of a nut on an externally threaded cylindrical member having opposite sides cut away whereby part of the thread is removed, comprising a continuation of an endmost thread across one of the cutaway portions.

EDWARD N. JACOBI. 

